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class=\"et_pb_column et_pb_column_2_3 et_pb_column_2_tb_body  et_pb_css_mix_blend_mode_passthrough\">\n\u003Cdiv class=\"et_pb_module et_pb_post_content et_pb_post_content_0_tb_body\">\n\u003Cp class=\"MsoNormal\">\u003Cb>Part L Evidence Made Simple: How SAPAPP Helps Builders Avoid Last Minute Compliance Problems\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Two weeks before handover, the site manager had the usual pressure on his desk.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The plots looked close. Kitchens were in. Air testing was booked. The client was asking for completion dates. The problem was not the build itself. The problem was the evidence.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Window specifications had changed. The heat pump model on site was not the same as the early design note. Several insulation photos were sitting in different phones across the team. The SAP assessor had been sent drawings from an older revision. Nobody wanted to find out at the last minute that the Part L evidence pack did not match what had actually been built.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">That is where ATSPACE brought in SAPAPP.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">This case study shows how a simple, structured evidence process helped a builder avoid a last minute Part L scramble, keep SAP information aligned with site, and give the project team a clearer route to handover.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">This case study follows the supplied ATSPACE case study brief format and keeps the project anonymised. \u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Project overview\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">• Project type: New build housing\u003Cbr>• Project size: 14 houses across two short terraces and four detached plots\u003Cbr>• Location: Maidstone, Kent\u003Cbr>• Client type: Regional house builder\u003Cbr>• Stage when ATSPACE joined: Mid build, before air testing and final SAP submission\u003Cbr>• Primary goal: Support Part L evidence and reduce late compliance issues\u003Cbr>• Secondary goal: Bring SAP data, site records and product evidence into one clear workflow\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Approved Document L Volume 1 gives guidance for dwellings under Part L of the Building Regulations in England. It covers areas including target primary energy rate, target emission rate, target fabric energy efficiency rate, limiting heat gains and losses, air permeability, commissioning and reporting evidence of compliance. \u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The project was not in serious trouble. That was the point. Most Part L problems do not start as failures. They start as small gaps in information that are left too late.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>The challenge, what was at risk\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The builder had a tight handover programme and multiple trades finishing at the same time. On paper, the design SAP calculations were workable. On site, the team had made normal construction changes.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Some changes were minor. Some mattered.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">A few window U values had been updated after procurement. The hot water cylinder specification had changed due to availability. A small number of thermal junction photos were missing. Ventilation commissioning dates had shifted. The air tightness strategy was clear to the site team, but the evidence trail was spread across drawings, emails, WhatsApp photos and supplier data sheets.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The risk was not just a single calculation issue. The bigger risk was delay caused by poor coordination.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">For Part L, the design, the installed specification and the evidence need to tell the same story. SAP is not just a desktop calculation at the end of the job. It relies on accurate inputs from drawings, fabric details, services, air testing, thermal bridging, ventilation and commissioning.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">GOV.UK describes SAP as the Standard Assessment Procedure used to calculate a home’s energy performance. Approved Document L also makes clear that air pressure test results are used to show compliance with relevant Part L requirements, and that results need to be recorded and provided in line with the regulation 43 process. \u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The client wanted a cleaner process before final testing, not a panic after it.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>What made this job tricky\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>1. Several plots were at different stages\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Some plots were plastered. Others still had service penetrations open. That meant evidence had to be gathered carefully, plot by plot, without assuming one photograph covered the whole site.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>2. Product substitutions had happened\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">This is common on live projects. The issue is not always the substitution itself. The issue is whether the substitution has been checked against the SAP model and recorded properly.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>3. Photos were not consistent\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Some photos had no plot reference. Some did not show enough context. Some were taken before the final detail was complete. For Part L evidence, a useful photo needs to show what it is, where it is, and why it matters.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>4. The SAP assessor was not getting live site changes\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The assessor had information, but not always the latest information. That creates avoidable back and forth near handover.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>5. The programme had little room for rework\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">A missed insulation detail, unconfirmed air barrier line, or wrong product data sheet can cost time when everyone is trying to finish.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Our approach, step by step\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">ATSPACE used SAPAPP as a practical evidence workflow, not as another admin task for the site team.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The aim was simple. Capture the right information once, in the right format, while it was still visible and easy to check.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Step 1: Review the design SAP inputs\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">We started by checking the design SAP information against the latest drawings and specifications.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">This included:\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">• Wall, floor and roof build ups\u003Cbr>• Insulation thicknesses and lambda values\u003Cbr>• Window and door U values\u003Cbr>• Thermal bridging approach\u003Cbr>• Heating and hot water systems\u003Cbr>• Ventilation strategy\u003Cbr>• Solar PV allowance where relevant\u003Cbr>• Air permeability target\u003Cbr>• Plot types and repeated details\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The purpose was not to redesign the scheme. It was to find gaps early enough for the builder to deal with them in a controlled way.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Step 2: Build a plot evidence tracker in SAPAPP\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">We set up the project in SAPAPP with each plot listed separately. The builder could then see what was complete, what was missing and what needed checking.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The tracker covered the main Part L evidence items linked to the SAP model and final reporting.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">This included:\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">• Fabric installation photos\u003Cbr>• Thermal junction records\u003Cbr>• Window and door evidence\u003Cbr>• Heating and hot water data\u003Cbr>• Ventilation commissioning information\u003Cbr>• Air test results\u003Cbr>• As built specification changes\u003Cbr>• Final assessor queries\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">This gave the site manager one clear view instead of a chain of scattered messages.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Step 3: Site walkdown with the construction team\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">ATSPACE attended site and walked the plots with the site manager and finishing foreman.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">We looked at the areas that often create Part L evidence problems:\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">• Loft insulation continuity\u003Cbr>• Cavity closer and reveal details\u003Cbr>• Service penetrations through the air barrier\u003Cbr>• Meter boxes and external wall penetrations\u003Cbr>• Party wall and separating wall junctions\u003Cbr>• Floor perimeter insulation\u003Cbr>• Duct routes and ventilation terminals\u003Cbr>• Heating plant labels and installed model numbers\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The tone was practical. The site team did not need a lecture. They needed a short list of what mattered, what was missing and what to photograph before it was covered.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Step 4: Align product evidence with the installed build\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The team uploaded product data sheets and installation photos into SAPAPP. ATSPACE then checked whether the information matched the SAP assumptions.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Where items did not match, we flagged them clearly.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">For example, one window package had a slightly different U value from the value originally used in the design SAP. That did not mean the plot would fail. It meant the SAP model needed to reflect the actual installed product before final submission.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The same applied to the hot water cylinder and ventilation units. Model references had to be checked against the installed units, not just the early design schedule.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Step 5: Prepare for air testing and final evidence\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Approved Document L includes air permeability and pressure testing as part of the dwelling guidance. It also links pressure test results with demonstrating compliance for relevant regulations and the Part L requirement around limiting heat gains and losses. \u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Before air testing, we helped the builder review likely leakage routes and evidence gaps. This included service penetrations, loft hatches, pipe boxing, external doors, thresholds, extract duct seals and plant cupboards.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The air test was still a real site test. SAPAPP did not replace proper testing. It helped the team prepare properly and hold the results in the right place once available.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>What we found on site\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The site was generally well built, but the evidence process had weak points.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">We found:\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">• Three plots had missing photographs for floor perimeter insulation\u003Cbr>• Two window data sheets did not match the installed frame schedule\u003Cbr>• One ventilation unit model reference needed confirmation\u003Cbr>• Several service penetrations needed sealing before air testing\u003Cbr>• The latest PV layout had not been issued to the SAP assessor\u003Cbr>• Some plot photos were useful but not labelled clearly enough\u003Cbr>• The design SAP file needed updating to match two procurement changes\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">None of these items were unusual. That is exactly why they matter.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">A late Part L problem often comes from ordinary site changes that nobody has pulled together in time.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Solutions and actions taken\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Evidence checklist issued to site\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">ATSPACE gave the site manager a simple plot by plot checklist inside SAPAPP. Each item showed what evidence was needed and whether it was complete.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Missing photos captured before close up\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">For plots not yet fully closed, the site team captured missing insulation and junction photos before final finishes covered the detail.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>SAP inputs updated\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The SAP assessor was issued with a clean schedule of changes. This included updated glazing values, heating system data, ventilation references and PV layout information.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Air leakage risks closed out\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Before testing, the team sealed visible service penetrations, checked loft hatches, reviewed extract duct collars and inspected external door thresholds.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Handover evidence pack prepared\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Rather than waiting until the end, evidence was organised as the plots moved through completion. That reduced the number of final queries.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Results, with numbers and evidence\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The project avoided the late scramble that the builder had been concerned about.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Key outcomes:\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">• 14 plots tracked individually in SAPAPP\u003Cbr>• 41 evidence gaps identified before final submission\u003Cbr>• 36 gaps closed within five working days\u003Cbr>• 5 remaining items assigned to named people with clear close out dates\u003Cbr>• Design SAP information updated before final air testing\u003Cbr>• Product substitutions reviewed before handover\u003Cbr>• Air test preparation completed across all plots before the booked test window\u003Cbr>• Final evidence pack issued in a structured format for the project team and assessor\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The builder did not lose time hunting through message threads for photos. The SAP assessor received cleaner information. The site manager had a live view of what was still open.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Most importantly, the project team could deal with Part L evidence while trades were still available and details were still visible.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">We do not claim that any process guarantees building control acceptance. Building control decisions remain with the relevant body. What SAPAPP did here was make the evidence clearer, earlier and easier to check.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>What the client received, deliverables\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The client received:\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">• Project SAPAPP evidence tracker\u003Cbr>• Plot by plot Part L evidence status\u003Cbr>• Missing information schedule\u003Cbr>• Site walkdown notes\u003Cbr>• Product substitution review notes\u003Cbr>• Updated information pack for SAP assessment\u003Cbr>• Air test preparation observations\u003Cbr>• Final evidence folder structure\u003Cbr>• Practical close out list for site and office teams\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">The deliverables were designed for real use. A site manager needs to know what to do next. A contracts manager needs to know what could affect handover. An assessor needs accurate inputs. SAPAPP helped bring those needs together.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Lessons learned, what other projects can copy\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Start evidence collection before finishes\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Do not wait until plasterboard, ceilings and boxing hide the details. Part L evidence is easier when the work is still visible.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Treat substitutions as SAP events\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">A change in window, heating, hot water, PV or ventilation specification should trigger a SAP check. It may be fine, but it should not be assumed.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Label photos properly\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">A photo without a plot number, location or context can be hard to use later. Good evidence is clear, dated, traceable and relevant.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Keep the assessor close to the live build\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">SAP calculations are only as good as the information going into them. Keep the assessor updated when the site changes.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Use one evidence system\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Spreading information across emails, phone galleries and message apps creates risk. One system makes ownership clearer.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Why ATSPACE, beyond compliance support\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">ATSPACE does not just produce reports and leave the builder to work out the rest.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Our value is in the practical gap between design intent and site reality. We understand that trades change, products change, access changes and programmes move. The job is to keep compliance evidence aligned with the building that is actually being delivered.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">With SAPAPP, ATSPACE helped this project by:\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">• Turning Part L evidence into a live process\u003Cbr>• Giving the site team clear actions\u003Cbr>• Helping the assessor work from current information\u003Cbr>• Reducing avoidable final week queries\u003Cbr>• Supporting the builder without overcomplicating the job\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Part L evidence is not just paperwork. It is proof that the design, specification and constructed dwelling have been properly coordinated.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>FAQ\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>What is SAPAPP?\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">SAPAPP is a structured evidence and coordination process used to help collect, track and manage information linked to SAP and Part L requirements. It helps builders see what is complete, what is missing and what needs checking before final submission.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Does SAPAPP replace SAP calculations?\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">No. SAPAPP does not replace SAP calculations or the role of a qualified SAP assessor. It supports the evidence process by helping organise the information that feeds into the SAP assessment and final project records.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>When should a builder start collecting Part L evidence?\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Start as early as possible, ideally before key details are covered. Insulation, junctions, air barrier lines, service penetrations and installed product references are much easier to evidence during construction than after finishes are complete.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>What causes last minute Part L problems?\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Common causes include missing photos, product substitutions, outdated drawings, unconfirmed ventilation data, changed heating equipment, poor air test preparation and SAP inputs that do not match the as built specification.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Is air testing part of Part L evidence?\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Yes, for new dwellings where pressure testing applies, air test results form an important part of the evidence route. Approved Document L links pressure test results with showing compliance for relevant building regulations and Part L requirements. \u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Can product substitutions affect SAP?\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Yes. Changes to windows, doors, insulation, heating, hot water, ventilation or PV can affect SAP outputs. Not every substitution creates a major issue, but it should be reviewed before final submission.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>What should a good Part L evidence pack include?\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">It should include accurate SAP inputs, current drawings, product data, installation evidence, commissioning records, air test results, relevant photographs and a clear record of any changes from design to as built.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Does ATSPACE guarantee Part L sign off?\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">No. ATSPACE does not guarantee building control outcomes. We provide evidence led support, technical review and practical coordination to help builders reduce avoidable compliance risk.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">\u003Cb>Call to action\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fb>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">Part L problems are easier to fix before the final week.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003Cp class=\"MsoNormal\">If your project is moving towards air testing, SAP finalisation or handover, speak to ATSPACE early. We can help you organise the evidence, check the gaps and give your site team a clear route to close out.\u003Co:p>\u003C\u002Fo:p>\u003C\u002Fp>\n\u003C\u002Fdiv>\n\u003C\u002Fdiv>","py-7","px-5","2026-05-14T09:32:36.000000Z","2026-05-14T09:51:18.000000Z",{"id":160,"user_id":245,"parent_id":7,"page_type_id":7,"linked_page_id":7,"title":246,"slug":247,"full_url":248,"live":11,"data_model":249,"created_at":250,"updated_at":250,"text_content_only":251,"html_content_only":251,"is_homepage":8,"is_template":8,"is_password_protected":8,"page_password":7,"parent":7},1,"Case 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